Working with an avalanche of calls and tip-offs, New Jersey investigators are still in pursuit of the man who shot dead an eminent cancer doctor in a Newark Airport hotel parking lot the night before he was to go on vacation with his wife.

“People realize this man is a predator who must be caught – before he does this to someone else,” Union County’s first assistant prosecutor told The Post yesterday.

“We’ve had excellent cooperation both from people who have identified themselves and from anonymous tips.”

Cops have been working around the clock to snare the killer who gunned down and robbed Dr. Jeffrey Perchick, 55, while he was parking his car in the Wyndham Hotel at Newark Airport March 1.

The investigation has taken them from the neighborhoods surrounding Newark Airport to drug rehabilitation centers within and outside the county. Anyone with information should call (908) 654-TIPS. All calls will be kept confidential.